Actually, I suspect you're incorrect with at least one of those assertions, possibly both. I say that because I've read many a post by hennebury elsewhere on other woodworking forums, and seen examples of his work going back thirty or more years. My interpretation of the evidence I've seen is that he has sophisticated woodworking knowledge covering both hand work and machine woodworking.
I somewhat disagree with the thrust of the posts he's made in this thread concerning the technique demonstrated and the need for viewers of that video to self-assess the risk along with their ability to emulate the technique without coming to harm - I somewhat disagree because I suspect quite a number of those viewers possibly don't have the experience to make a good judgement. I say the last sentence in light of my experience of working in the USA and witnessing more than one professional woodworker undertaking essentially the same procedure, i.e., a professional making the judgement on safety of a specific technique. At least one of those woodworkers made the wrong safety assessment and experienced a quite savage kickback resulting in a lump of wood hitting his upper body and fingers/hand flesh contacting the sawblade followed by a trip to the emergency room; fortunately the injuries were limited essentially to upper body bruising and lacerations to hand flesh and digits requiring quite a number of stitches. So, if a pro can get it so spectacularly wrong, what hope is there for the relatively inexperienced amateur? As I stated in my first post in this thread I found Americans, when I lived and worked there, remarkably cavalier in their use of table saws. Quite a lot of what they got up to on the machine I found gobsmackingly buttock clenching. But I think many of them found me comparatively timid and wimpy with my 'girly' British table saw work habits.
Personally, if video making of woodworking techniques was my thing I would never demonstrate such a practice as dropping on as seen in that video. It probably does give the inexperienced or bull-headed woodworker a misplaced confidence in the efficacy of such a technique. As to whether or not videos of that nature with what I personally consider to be unsafe practices illustrated should come with strongly worded health warnings I find hard to decide one way or another. There's a risk of being too nannyish, I suppose. There's also the fact that all these online information sources recognise no national boundaries or jurisdictions. Whilst we in the UK, bound by our national legislation and regulations, plus our typical machine woodworking set-ups and work habits, might abhor numerous techniques shown via online sources, in other jurisdictions the technique may well be considered uncontroversial, or even if considered somewhat dodgy, then it's up to the viewer to decide if it's okay for them to emulate, or not. Slainte.